The PCCs, MCCs & PDBs shall be metal clad enclosed and be fabricated out of
high-quality CRCA sheet, suitable for indoor installation, front operated, and floor
CRCA sheet steel used in the construction of PCCs / MCCs / PDBs shall be 2 mm
thick for structure, 1.6 mm thick for doors, covers shrouds, and 3 mm thick for
gland plate and shall be folded and braced as necessary to provide a rigid
support for all components. Joints of any kind in sheet shall be seam welded, all
welding slag grounded off and welding pits wiped smooth with plumber metal.